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LED: The LCD technology is the same in the cathode fluorescent lamp lit TVs and the LED lit TVs, but the LED lighting of the picture results in a sharper picture, more energy efficient using about 40% less electricity than a standard LCD TV, the LED backlighting system has no delay or warm up time, and the LED lit TVs are much thinner than the traditional LCD or plasma TVs.

4K (Ultra HD) [3840 x 2160]: The increasing availability of 4K, under the official moniker Ultra HD, can deliver consumers a greatly improved video display image for larger screen applications, and can greatly reduce the ability for viewers to see any visible pixel structure on the screen, unless you place yourself extremely close to the screen. This means even smoother edges and depth - in fact, when combined with faster screen refresh rates, 4K has the potential to deliver almost as much depth as 3D - without the need for glasses.

LED: The LCD technology is the same in the cathode fluorescent lamp lit TVs and the LED lit TVs, but the LED lighting of the picture results in a sharper picture, more energy efficient using about 40% less electricity than a standard LCD TV, the LED backlighting system has no delay or warm up time, and the LED lit TVs are much thinner than the traditional LCD or plasma TVs.

4K (Ultra HD) [3840 x 2160]: The increasing availability of 4K, under the official moniker Ultra HD, can deliver consumers a greatly improved video display image for larger screen applications, and can greatly reduce the ability for viewers to see any visible pixel structure on the screen, unless you place yourself extremely close to the screen. This means even smoother edges and depth - in fact, when combined with faster screen refresh rates, 4K has the potential to deliver almost as much depth as 3D - without the need for glasses.

The wider the viewing angle, the better the picture will look to people sitting to the extreme left or right of the TV. If you regularly cram a host of friends and family into your living room for event viewing, you want the widest viewing angle possible.